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Related Concept Videos

B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
Diversity of Antigen Receptors01:28

Diversity of Antigen Receptors

Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
Special Features of Adaptive Immunity01:20

Special Features of Adaptive Immunity

The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
Lymphoid Cells and Tissues01:18

Lymphoid Cells and Tissues

Lymphoid cells and tissues are integral to the immune system, which is crucial in maintaining our body's defense against harmful pathogens. They form the building blocks of lymphoid organs, which include the spleen, thymus, and lymph nodes.
Lymphoid cells consist of various types of immune system cells. These include B and T lymphocytes, which are responsible for producing antibodies and killing infected cells, respectively. Dendritic cells act as messengers between the innate and adaptive...
T Cell Types and Functions01:24

T Cell Types and Functions

When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...

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Related Experiment Video

Updated: Jul 18, 2026

The Isolation, Differentiation, and Quantification of Human Antibody-secreting B Cells from Blood: ELISpot as a Functional Readout of Humoral Immunity
08:26

The Isolation, Differentiation, and Quantification of Human Antibody-secreting B Cells from Blood: ELISpot as a Functional Readout of Humoral Immunity

Published on: December 14, 2016

[Heterogeneity and function of human B lymphocytes].

Serge Jacquot1, Olivier Boyer

  • 1Université de Rouen, Faculté de médecine et de pharmacie; CHU de Rouen, Inserm U519, Laboratoire d'immunologie, 76163 Rouen Cedex 1, France. serge.jacquot@chu-rouen.fr

Medecine Sciences : M/S
|December 13, 2006
PubMed
Summary

Human B cells, crucial for immunity, comprise diverse subsets with distinct roles in antibody production and immune regulation. Understanding B cell heterogeneity aids in studying immunodeficiencies and autoimmune diseases.

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The Isolation, Differentiation, and Quantification of Human Antibody-secreting B Cells from Blood: ELISpot as a Functional Readout of Humoral Immunity
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Area of Science:

  • Immunology
  • Cell Biology

Context:

  • B lymphocytes are key players in the adaptive immune system, responsible for antibody production and immune regulation.
  • Human B cells exhibit significant heterogeneity, with distinct subsets representing different maturation stages and immune response pathways.

Purpose:

  • To explore the diverse subsets of human B cells and their roles in humoral immunity.
  • To elucidate the interactions between B cells and follicular helper T cells in adaptive immune responses.
  • To characterize the differentiation pathways of various B cell populations, including T-independent responders.

Summary:

  • Naïve B cells (IgMlow IgDhigh CD27-) engage in T-cell dependent responses, forming germinal centers and interacting with follicular helper T cells via costimulatory molecules.
  • Follicular helper T cell interactions are critical for generating plasma cells producing high-affinity antibodies and memory B cells.
  • IgMhigh IgDlow CD27+ B cells, resembling splenic marginal zone B cells, appear specialized in T-independent responses, with their differentiation pathways under investigation.

Impact:

  • Deciphering human B cell heterogeneity offers insights into humoral immunodeficiencies and autoimmune diseases.
  • This research enhances our understanding of fundamental B cell biology and immune system function.
  • Identifying B cell subsets provides diagnostic and therapeutic targets for immune-related disorders.